I printed a set of the 8 inch props and flew my quadcopter with them. The performance was comparable to commercial props and it did seem like the quad sounded less like an angry swarm of bees than with conventional propellors.

I printed a set of the 8 inch props and flew my quadcopter with them. The performance was comparable to commercial props and it did seem like the quad sounded less like an angry swarm of bees than with conventional propellors.

I'm pretty sure that A) the same sound issues that affect a helicopter don't affect a quad due to subsonic tip velocity and B) in the design these are supposed to actually be vibrated up and down by motors to break up vortices. If you notice the sound clips on that site the only sound that is decreased is the loud supersonic "clapping" sound that helicopters make, and that toy helicopters decidedly don't. That said these look awesome and if I had a quad I would totally try these out :)

I do have a printer, a Replicator, but it is maxed out right now with projects I have been working on. I need another printer dammit... Anyway I plan on printing these soon and will let you know if you don't beat me too it first.